computer cold start problem

September 18, 2011 at 02:37:48
Specs: Windows 7
HI. My computer system is as follows:
CPU - Intel Core 2 Quad 2.4 MHz. (Q6600)
Motherboard- ASRock P5B-DE (lastest Bios installed) - Intel P965 + ICH8 Cipsets
Ram- DDR2 4Gb (PC6400)
Sata Hdd - 500Gb
Power supply tested on another computer and is working fine. (Arctic 700)
Pci-Express graphics card (Leadtek Winfast PX6800TDH - Nvidia G-Force 6800) Hoping to update this soon!
Windows 7 x64 bit updated

Anyway if I switch off my computer at the MAINS switch and after a few minutes of complete power down, the computer will not start up immediately when I next switch it on. I have to wait for about 4-5 minutes after switching on at the mains before the computer will switch on. If I leave the computer supply switched on and connected to MAINs power supply I have no problem and the computer starts immediately when I press the computer power on switch.

Any feedback will be greatly appreciated.


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September 18, 2011 at 03:51:48
I believe it's a motherboard issue.... i seen a couple PC's do this in the past (after trying new power supplies/ram/reseating everthing etc.).. and my idea is that somewhere there's a bad joint that, when cold... does not make contact.

Apply some power (even when the PC is off it's still supplying standby power if the main power is on) and then after a few minutes it would work fine, and stay on forever afterwards and work perfectly.

Basically it's some sort of motherboard-failure but one at least that you could live with as long as it works ok once it's on.

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September 18, 2011 at 04:02:05
I had the system running on an Asus P5K-E motherboard before I change to the AsRock and it had the same problem. The Asus P5K-E then failed on me one day and that was why I changed it to the AsRock mobo to try and see if I could solve the problem. I wonder if it has anything to do with chipset or if the mobo takes sometime to auto configurate the system. Maybe its just my luck to get 2 mobos with a bad joint! :(
Thanks for your reply anyway.

Anymore ideas would be appreciated.


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September 18, 2011 at 04:47:02
Just a thought but have you tried it with a lower end vid card... or if your board has onboard video with that instead...

I know you wouldn't think it would be a problem with that power supply but still....

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September 18, 2011 at 07:13:10
Nope. The motherboard does not have onboard video and I did try it on a higher end pci-express video card which i borrowed but the problem was still there. I was unable to get a more less-powered video card to try tough.:(


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